On Wed 20-02-19 08:31:05, Meelis Roos wrote: > > Could > > https://lore.kernel.org/linux-mm/20190219123212.29838-1-larper@xxxxxxxx/T/#u > > be relevant? > > Tried it, still broken. OK, I didn't put too much hope into this patch as you see filesystem metadata corruption so icache/dcache coherency issues seemed unlikely. Still good that you've tried so that we are sure. > I wrote: > > > But my kernel config had memory compaction (that turned on page migration) and > > bounce buffers. I do not remember why I found them necessary but I will try > > without them. > > First, I found out that both the problematic alphas had memory compaction and > page migration and bounce buffers turned on, and working alphas had them off. > > Next, turing off these options makes the problematic alphas work. OK, thanks for testing! Can you narrow down whether the problem is due to CONFIG_BOUNCE or CONFIG_MIGRATION + CONFIG_COMPACTION? These are two completely different things so knowing where to look will help. Thanks! Honza -- Jan Kara <jack@xxxxxxxx> SUSE Labs, CR
